Mike this is where i am thinking the problem originally started with steering. Verify that you have the igbt's properly wired. If you know how to get into diagnostics screen then go to steering sensor. What you want to look for is neutral, left and right parameters. See if the sensor is with in these parameters. If not then ahjust the sensor or you have a bad sensor or lever in the steer sector. Next inspect the linear actuator/ power steer cylinder to see if it is bent. You will need to remove the clamp from the rubber boot at the tail shaft and slideback toward the front of unit. With unit jacked and blocked up. turn the steering until the rod is fully extended. It will be a screw drive. if it is bent, it will bind. While up in the air also check the king pin thrust bearings as well. Check back with what you find.